Index: /trunk/src/VBox/Additions/WINNT/tools/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/WINNT/tools/Makefile.kmk	(revision 64962)
+++ /trunk/src/VBox/Additions/WINNT/tools/Makefile.kmk	(revision 64963)
@@ -52,5 +52,5 @@
   AdditionsInstCertFiles_SOURCES += $$(AdditionsInstCertFiles_0_OUTDIR)/$(1)=>$1
   AdditionsInstCertFiles_CLEAN   += $$(AdditionsInstCertFiles_0_OUTDIR)/$(1)
-  $$$$(AdditionsInstCertFiles_0_OUTDIR)/$(1): $$(2) | $$$$(dir $$$$@)
+  $$$$(AdditionsInstCertFiles_0_OUTDIR)/$(1): $$(2) | $$$$(dir $$$$@) $(VBOX_RTSIGNTOOL)
 	$(QUIET)$(RM) -f -- "$$@"
 	$(VBOX_RTSIGNTOOL) extract-exe-signer-cert --signature-index $3 --exe "$$<" --output "$$@" --der